Published in
Springer Verlag, Journal of Structural Chemistry, S1(53), p. 43-46
DOI: 10.1134/s0022476612070062
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The application of in situ X-ray diffraction for the study of mineral reactions: The formation of lawsonite at 400°C and 25 kbar
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A. Y.-U. Likhacheva,
A. D. Chanyshev,
A. I. Ancharov
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Abstract
The method of in situ X-ray diffraction with the influence of temperature and pressure on the sample was successfully applied in Siberian Synchrotron and Terahertz Radiation Centre on the experimental station Diffractometry in hard X-rays. High-pressure water-containing lawsonite silicate CaAl2[Si2O7](OH)2·H2O is obtained at 400°C and 25 kbar in a diamond anvil cell during the decomposition of laumontite. In situ diffractometry of the reaction products helps to determine parameters of the unit cell of lawsonite and phase composition of CaO-Al2O3-SiO2-H2O at 400°C and 25 kbar.